Access MSMQ from C++ (non COM component) code - c++

Question

I am new to the concept of MSMQ(Microsoft Message Queues). I had a glimpse of the sample code from Microsoft's link and am trying to create a simple MSMQ queue. Here is my full code (mostly from Microsoft's link).
#include "stdafx.h"
#include "windows.h"
#include "mq.h"
#pragma comment (lib, "Mqrt.lib")
#include "tchar.h"
#include <stdio.h>
#define BUFLEN = 256;
#include <iostream>
HRESULT CreateMSMQQueue(
LPWSTR wszPathName,
PSECURITY_DESCRIPTOR pSecurityDescriptor,
LPWSTR wszOutFormatName,
DWORD *pdwOutFormatNameLength
)
{
// Define the maximum number of queue properties.
const int NUMBEROFPROPERTIES = 2;
// Define a queue property structure and the structures needed to initialize it.
MQQUEUEPROPS QueueProps;
MQPROPVARIANT aQueuePropVar[NUMBEROFPROPERTIES];
QUEUEPROPID aQueuePropId[NUMBEROFPROPERTIES];
HRESULT aQueueStatus[NUMBEROFPROPERTIES];
HRESULT hr = MQ_OK;
// Validate the input parameters.
if (wszPathName == NULL || wszOutFormatName == NULL || pdwOutFormatNameLength == NULL)
{
return MQ_ERROR_INVALID_PARAMETER;
}
// Set queue properties.
DWORD cPropId = 0;
aQueuePropId[cPropId] = PROPID_Q_PATHNAME;
aQueuePropVar[cPropId].vt = VT_LPWSTR;
aQueuePropVar[cPropId].pwszVal = wszPathName;
cPropId++;
WCHAR wszLabel[MQ_MAX_Q_LABEL_LEN] = L"Test Queue";
aQueuePropId[cPropId] = PROPID_Q_LABEL;
aQueuePropVar[cPropId].vt = VT_LPWSTR;
aQueuePropVar[cPropId].pwszVal = wszLabel;
cPropId++;
// Initialize the MQQUEUEPROPS structure.
QueueProps.cProp = cPropId; // Number of properties
QueueProps.aPropID = aQueuePropId; // IDs of the queue properties
QueueProps.aPropVar = aQueuePropVar; // Values of the queue properties
QueueProps.aStatus = aQueueStatus; // Pointer to the return status
// Call MQCreateQueue to create the queue.
WCHAR wszFormatNameBuffer[256];
DWORD dwFormatNameBufferLength = 256;
hr = MQCreateQueue(pSecurityDescriptor, // Security descriptor
&QueueProps, // Address of queue property structure
wszFormatNameBuffer, // Pointer to format name buffer
&dwFormatNameBufferLength); // Pointer to receive the queue's format name length in Unicode characters not bytes.
// Return the format name if the queue is created successfully.
if (hr == MQ_OK || hr == MQ_INFORMATION_PROPERTY)
{
if (*pdwOutFormatNameLength >= dwFormatNameBufferLength)
{
wcsncpy_s(wszOutFormatName, *pdwOutFormatNameLength - 1, wszFormatNameBuffer, _TRUNCATE);
wszOutFormatName[*pdwOutFormatNameLength - 1] = L'\0';
*pdwOutFormatNameLength = dwFormatNameBufferLength;
}
else
{
wprintf(L"The queue was created, but its format name cannot be returned.\n");
}
}
return hr;
}
int _tmain(int argc, _TCHAR* argv[])
{
std::cout<<"started!";
LPWSTR sam = L".\\myQueue";
LPWSTR out_name = L"Sampleoutput";
DWORD d1 = 60;
DWORD *dd = &d1;
HRESULT hs = CreateMSMQQueue(sam,pt,out_name,dd);
return 0;
}
I didn't change much of the code. When I run this code, I get an "The application was unable to start correctly(0x0000142)" error. By debugging I found out tat its due to an "Memory access error" but there is no hint as to where it occurs. Please help me out!
Is there any format for queue names? Or the output format name ?